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<b>let </b><font color="Maroon">k</font> be    <a href="subset_1.html#M1">Element</a> of  <a href="numbers.html#K5">NAT</a> ;<br/><b>let </b><font color="Maroon">i</font> be    <a href="subset_1.html#M1">Element</a> of  <a href="numbers.html#K5">NAT</a> ;<br/><b>let </b><font color="Maroon">ll</font> be   <a href="cqc_lang.html#NM2">CQC-variable_list</a> of <font color="Maroon">k</font>;<br/>





<b>assume </b><a NAME="E1:10"/>
<font color="Maroon">i</font> <a href="hidden.html#R2">in</a>  <a href="relset_1.html#K4">dom</a> <font color="Maroon">ll</font>
 ;<br/>

<a NAME="E2:10"/><b>then </b><i><font color="Green">E55</font></i>: 
<font color="Maroon">ll</font> <a href="funct_1.html#K1">.</a> <font color="Maroon">i</font> <a href="hidden.html#R2">in</a>  <a href="relset_1.html#K5">rng</a> <font color="Maroon">ll</font>
 
<b>by </b><i><a class="ref" href="funct_1.html#T12">FUNCT_1:12</a></i>;<br/>
<a NAME="E3:10"/>
 <a href="relset_1.html#K5">rng</a> <font color="Maroon">ll</font> <a href="tarski.html#R1">c=</a>  <a href="qc_lang1.html#K2">bound_QC-variables</a> 
 
<b>by </b><i><a class="ref" href="cqc_lang.html#D5">CQC_LANG:def 5</a></i>;<br/>
<b>hence </b><a NAME="E4:10"/>
<font color="Maroon">ll</font> <a href="funct_1.html#K1">.</a> <font color="Maroon">i</font> is   <a href="qc_lang1.html#NM3">bound_QC-variable</a>
 <b>by </b><i/>;<br/>


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